set 3 MCQ Questions & Answers Detailed Explanation

Question : 1

Consider the following statements:

1. The gravitational force exerted by the sun on the moon is greater than the gravitational force exerted by the earth on the moon.
2. A heavy body falls at a faster rate than a light body in vacuum.

a) 1 and 2 both

b) 1 only

c) 2 only

d) None

Question : 2

A couple produces a

a) no motion.

b) pure rotational motion

c) pure linear motion

d) both linear and rotational motion

Question : 3

A truck, a car and a motorcycle have equal kinetic energies. If equal, stopping forces are applied and they stop after travelling a distance of X, Y and Z respectively, then

a) X = Y = Z

b) X < Y < Z

c) X > Y > Z

d) X ≅ 4Y ≅ 8Z

Question : 4

A simple machine helps a person in doing:

a) the same amount of work slowly

b) the same amount of work with lesser force

c) less work

d) the same amount of work much faster

Question : 5

If a ship moves from freshwater into seawater, it will

a) rise a little higher

b) sink a little bit

c) sink completely

d) remain unaffected